Wireless signal sensor



FIG. 1 is a front view of a wireless signal sensor;

FIG. 2 is a rear view thereof;

FIG. 3 is a left-side view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a front-left perspective view thereof.

The broken lines in the drawings depict portions of the wireless signal sensor that are not part of the claimed design. Any shading and cross-hatching are not features of the design but are utilized to illustrate the surface contours of the wireless signal sensor in the drawings. 

CLAIM The ornamental design for a wireless signal sensor, as shown and described. 